/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * GridLayout example snippet: insert widgets into a grid layout
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.1
 */
import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet6 {

public static void main (String [] args) {
	Display display = new Display ();
	final Shell shell = new Shell (display);
	shell.setText("Snippet 6");
	shell.setLayout(new GridLayout());
	final Composite c = new Composite(shell, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.numColumns = 3;
	c.setLayout(layout);
	for (int i = 0; i < 10; i++) {
		Button b = new Button(c, SWT.PUSH);
		b.setText("Button "+i);
	}

	Button b = new Button(shell, SWT.PUSH);
	b.setText("add a new button at row 2 column 1");
	final int[] index = new int[1];
	b.addListener(SWT.Selection, e -> {
		Button s = new Button(c, SWT.PUSH);
		s.setText("Special "+index[0]);
		index[0]++;
		Control[] children = c.getChildren();
		s.moveAbove(children[3]);
		shell.layout(new Control[] {s});
	});

	shell.open ();
	while (!shell.isDisposed ()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}

}
